Rotary drier.



S. W. BONSALL.

ROTARY DRIER.

APPLICATION FILED H12, 1912,

INVENTOR b/ M Z. /C3 9% v- '1a (4% A NOR/VH5 Patented Dec. 17, 1912.

WITNESSES. W

iinrra swe r 9 GFFICE;

SEYMOUR W, BONSALL, OF NEW YORK, N. Y.

ROTARY ns-IER.

ill-l whom it may concern: L Be it known that I, SnYMoon'lV. Boncitizen of the United States, residing ew York, in the county New York and lot New York, have invented certain new and useful Improvements in Rotary I Driers; and I do hereby declare the followiiig-lto' be a'full, clear, and exact description offthe invention, such as will enable others 10 slgillcd in the art to which it appertains to make and use the same.

This application is a division of an applica tion filed by me November 17th, 1911, Serial No. (360819.

My present invention has relation to means whereby lumber may be quickly and conveniently-dried, and the principal object of the invention is the provision of means whereby a powerful draft of heated air may 20 be p'roduced in a'suit-ably disposed group of boards, planks, veneer or other sawed luin bet, whereby the moisture held within the fibers thereof may be quickly and uniformly carried off.

5 My im proved apparatus comprises broadly 3 driven outward around and past the properly disposed boards or planks.

i In the preferred. forrrFof the invention herein claimed, the centrifugal draft is combined with an auxiliary circumferential draft produced by a scoop shaped con formation of the external wall of the container.

My invention also covers certain preferred means for equalizing the air distribution as well as to a means whereby the heat 40 of steam is made available for increasing the absorptive power of the air currents pro duced. I 1

My inifention is shown in a certain pre ferred embodiment in the accompanying drawings, wherein+ Figure l is a vertical section of the device and Fig. 2 is a horizontal section of the form shown in Fig. 1.

The main container, as shown in the drawings is composed of an outer cylindrical scoops 12.

casing 10; which is solid, save where exit openings for air are provided at 11, and "where the casing is opened outward at diametrically opposed points to term vertical The dotted lines in Fig. show Specification of Letters Patent.

7 Qri g inal'application filed November; 17, 1311, Serial No. 660,819.

- January 2, 1912. Serial No, 668,138.

Patented Dec. 1'7, 1912.

Divided and this application filed at a suitable speed by any appropriate' means, for instance a pulley 21' whose arma ture is made fastto a shaft 22, which is fastened to the hub 20.

Access to the interior of the casing is bad through the doors hinged at 13 and through the doors are introduced the boards or other material to be dried, the preferred arrangement of the boards being indicated at 23, wherein the edges are presented approximately to the current of air produced by the components hereinafter described. The top of the container is provided with a deflector 2%, whereby the air which tends to enter at the top is directed toward the center. The two-part steam pipe 25 is carried in an axial position by the container, the same being arranged tocarry steam upward through one half of the pipe from the drum Miami to be returned to the drum through the other half of the pipe. This may be done, by means of. any appropriate constructiongmd preferably in the. manner set forth in my divisional applicationaforesaid. It will be understood that the steam pipe is intended to revolve'with the container At the top of the device the steam is carried outward by spiral convolutions, forming a grid in the path of the entering' air at the top and thence in vertical coils up and down as;

shown at 28 across'one of the vertical openings made by one of the scoops 12; thence back across the top and up and down-by coils 29 in the opposite vertical opening and thence back to the return half of the vertical steam pipe;

It will be seen that when the container is rotated in the direction of the arrow in Fig. 2, the scoops 12 will act to cause a strong circumferential. draft; which, togethcr with the air entering at top and bottom at the central openings will make the resultant draft which will find its way between the boards 23 or other articles to be dried and finally out through the air passages 1L in order to so regulate the air which enters at the center,- and is drawn in by centrifugal force, that the current may be equalized outwardly, I prefer to employ distributers for this purpose.

These dist-ributers are shown in the form of concentric tubes of wire mesh 30 and,3l at the bottom and top respectively and these are so disposed that; there are more tubes near the opening than at points farther in and the total-thickness of wall formed by the concentric tubes diminishes'toward the middle of the-machine. The air enters 'inside of the tubes and finds its way outward through the wire'mesh as well as through the'end of the tubes and by this means the tendency of the draft to confine itself to the neighborhood of the floor and, top is counteracted.

The action of the hot'steam pipe placed. in the path of the entering air both at the, center and near the scoop-shaped openings is, of course, to increase the capacity of the air to absorb moisture and to give it a strong drying effect upon the lumber or other material.

A variety of changes may be introduced into this device without departing from my invention and I do not limit myself to the details herein shown and described.

What I claim is,

1. A drier comprising a revoluble casing open at the side to form a scoop and having exit openings in the outer walls of said casing, substantially as described.

2. 'A drier comprising a revoluble casing open at the side to form a scoop at two points diametrically opposed and having ings in the wall of the casing, substantially as described.

5. A drier comprisinga revoluble casing, having central openings at top andbottom and openings down the side, steam pipes at all of said openings and exit openings in the Wall of the casing, substantially as described. I

6. A drier comprising a revoluble casing, having openings near the center at top and bottom and down the side at opposite sides to form scoops, draft distributing means for said central openings, steam pipes at said openings and exit openingsfor the air between said vertical openings, substantially as described.

In testimony whereof, I atlix my signature, in presence of two witnesses.

SEYMOUR W. BONSALL. Witnesses H. GREIFF, JOHN HADCOCK. 

